Apparatus for shearing glass.



No; 814,774. PATENTED MAR. 18, 19.06. H. L. DIXON & G. A. MARSH. APPARATUS FOR SHEARING GLASS.

APPLICATION FILED MA\R.10.1905.

2 SHBETS-SHEET 1 No. 814,774. PATENTED MAR. 13, 1906. H; L. DIXON & G. A. MARSH.

APPARATUS FOR SHEARING GLASS;

APPLICATION FILED MARIO. 1905.

2 SHEETS-SHEET 2,

-WIT II88IS IIQVENTOR' UNITED STATES PATENT OFFICE.

IENRY L. DIXON AND GEORGE A. MARSH, OF PITTSBURG, PENNSYL- VANIA, ASSIGNORS TO AUTOMATIC MACHINE GLASS COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

Patented March 13, 1906.

Application filed March 10 1905. Serial No. 249,43 7.

To all whom it may concern:

Be it known that we, HENRY L. DIXON and GEORGE A. MARSH, of the city of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Apparatus for Shearing Glass, of'which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a vertical longitudinal section of our improved apparatus. Fig. 2 is a front elevation of the same. Fig. 3 is a top plan view of the forehearth bottom plate with cutoff plate and attachments. Fig. 4 is an enlarged central vertical section of the cut-off device. Fig. 5 is a top plan view showing the bottom plate of the cut-off. Fig. 6 is a bottom plan view of the outlet-nozzle. Fig. 7 is a top plan view of the two air-blast rings; and Fig. 8 is a-view similar to Fig. 7, showing another form.

Our invention relates to apparatus for cutting off lass feed or drawn from a furnace or rece tac e.

T e object of the invention is to provide apparatus which will cut off the glass without crizzlin or without forming threads or ortions which will injure the appearance 0 the article formed from the glass so cut off.

The invention consists in providing means for cutting off the lass by directing a current of fluid against 1t, this fluid being referably a gaseous fluid, such as air, super eated steam, &c.

The invention also consists in providin means for simultaneously directing the fluid against a stream of glass on different sides thereof; further, in driving the fluid against the stream in such a manner as to cause a swirl and give a twisting action.

It further consists in providing meansfor simultaneously driving streams at two different levels, one stream of fluid iving-a twisting action to the glass to one irection and the other a twisting action in the opposite direction.

The invention further consists in providing a relief-outlet for the air or fluid used in cutting off the lass, and, further, in the construction and arrangement of the parts, as hereinafter more fully described and claimed.

In the drawings, 2 represents a portion of a lass-tank furnace having an overhanging orehearth or projection 3, the bottom of which is preferably near the .level of the glassbath in the tank. Thus the glass-line will preferably lie at about the level a a, though the location of the forehearth may of course be varied as desired.

An upwardly-tapering hole is cut through the bottom plate 4 of the forehearth and its refractory lining 5, and in this hole is set our improved cut-ofl' device. In the form shown a nozzle 6 of porcelain or suitable refractory material and of general conical form is forced up Within the holein the forehearth-bottom and preferably sealed by an asbestos gasket 7, seated in a recessedportion of the nozzle and compressed between it and the sides of the hole as the nozzle is forced up. This nozzle is recessed upwardly in its central portion, and its bottom inner face is provided with a central recess 8, from which radial outletports 9 lead outwardly and downwardly to the lower edge of the nozzle. These ports are to allow exit of the air which is preferably forced upwardly as it is driven in the stream of glass passing down throu h the nozzle.

The bottom plate of the orehearth is provided with side supporting-guides 10 10, adapted to receive the ends l'l'of the front supportingbar 12 for the blow-plate. This blow-plate is made in two partsnamely, an upper plate 13 and a lower plate 14which ,are secured together by screw-bolts 15 or other suitable means. The outer portion of the upper late is provided with a centeringstud 16, a apted to enter a registerin recess in the bottom plate of the forehearth when the blow-plate is swung up into place. The plate is then secured by a key driven through a slot in the screw-bolt 17, which extends Within a slot (indicated at 18) in the upper plate. The lower half of the blo'w-plate is shown in top planview in Fig. 5. The airinlet hole is indicated at 19, the air being spread and equalized by the lune-shaped deflector 20.

21 is an upwardlyextending boss having a 7 The top blow-ring 23 is secured into a registering' hole in the upper half, of the blow plate, and between the rings 22 and 23 is the plain spacing-ring s i, having inclined or bevsled upper and lower faces to it theincl-ined or beveled faces of the blow-rings.

As shown in Fig. 7, the lower ring 22, shown at the right-hand, is provided on its upper edge with inclined ports 25', extending around it and directed clockwise. T he top ring 23, shown at the left hand, is similarly provided on its lower face with slots which are directed in a counter-clockwise direction.

In order to shut oil the glass from the nozzle and blow-plate when desired, we preferably provide the refractory internal stopper 26, which is of sullicient size to entirely cover the hole in the bottom of the iorehearth and may beraised and lowered by a stem 27, eX tending up through a hole in the top of the forehearth and protected by refractory sleeve 28. Any other suitable means may be employed lor shutting off the glass from the nozzle when desired.

In our apparatus, the parts being in the position shown in Figs. 1 and 2 with the stopper 26 raised, the glass flows down through the hole in the nozzle into the molds or suitable receptacles beneath. Whenjt is desired to cut off the stream of glass, air under pressure is admitted through the pipe 29, which air passes through the non-radial slots the two blow-rings, one rin thus producinga swirling action in the glass in one direction and the other a similar swirling action in the 0ppo..

site direction. The glass is thus simultaneously twisted in opposite directions, so that it is quick] cut oil without leaving strings or portions oi glass which would mar the article molded from the glass thus cut oil. The streams being directed slightly upwardly will tend to hold. up the glass flowing down through the nozzle and prevent injury to the glass cut 0E, while the surplus air passes through the channels between the nozzle and the blowplate, thus preventing the blowing of airubbles into the bath and the shredding of the glass. The airrnay now be turned 0d either by hand or automatically, when the stream of glass will again start down through the hole and will again cut on? .when the desired amount has flowed through. The glass may be received in cups or m0 ds; preferably on an endless carrier, which may then be brou ht into registry with other molds, in wide 1 the glass is given its final form.

In the form shown in Fig. 8 only two slots are employed in the lower 22 and the upper ring 23. These slots are non-radial and give the opposite twists or swirls to the glass, as'before. The number and direction of the slats may of course be varied in many ways. We prefer, however, to make the slots nomradial', so as to produce the swirl. One ring may be employed, if desired, giving a twisting action in one direction, though we prefer to use both, asthis severs the glass more quickly and more sharply without leaving knobs or strings.

The advantages of our invention result from the simple and eiiective apparatus for cutting off glass by a blast of fluid, which is preferably a gaseous fluid, though li uid may be used. The glass being inclose on all sides when the cutting-blast is applied, the blast acts uickly and uniformly to out and twist off t e connection, thus doing away with the use of shears, moving shutters, &c., which rapidly deteriorate and burn out. a well as stick to the glass.

The apparatus may be used either for an outward-flowing stream, as shown, or for on tting oil the glass sucked into a cup or gatherer or taken out in other Ways.

Many changes may be made in the form and arrangement of the blow-0d device, the liquid or gaseous fluid used, and the other parts of the apparatus without departing from our invent1on.

1. In apparatus for severing glass, a jet device arranged to direct a current of fluid under pressure against the glass while in a molten or plastic condition; substantially as described.

2. In apparatus for severing glass, a jet device arranged to direct a current of fluid under pressure against the glass while in a molten or plastic condition, and a connection leading from a source of gaseous fluid under pressure to the jet device; substantially as described.

3. In apparatus for severin glass in a molten or plastic condition, a jet evice arranged to direct a current of, fluid under pressure against the glass at an angle to cause a swirl;

substantially as described.

4. In glass-severing a paratus, a ring surrounding a portion of mo ten lass, and means for directing a current of fluid under pressure against the glass while surrounded by the ring; substantially as described.

5. In glass-severing apparatus, a nozzle through which the glass flows, and a jet device arranged to direct a current of gaseous fluid against the lass while inclosed by the nozzle; substantial y as'clescribed.

6. In glass-severing a paratus, a nozzle through which the glass ows, and a jet de vice arranged to direct a current of aseous fluid a ainst the glass in a non-radia direction while inclosed by the nozzle; substantially as described.

7. In glass-severing a paratus, a nozzle or inclosi ring arranger to surround a portion of mo ten or plastic glass, and non-radial slots therein arranged to direct a current of gaseous fluid against the glass in a direction to cause a swirl therein; substantially as described. I

8, In glass-severing apparatus, a nozzle an outlet, wit

arranged to contain a stream 0? glass and having non-radial slots arranged in opposite directions to cause 0 posite swirls in the lass stream and sever the same; substantial y as described.

9. In lass-severing apparatus, a nozzle or surrounding ring having a slot arranged to direct a current of fluid under pressure against the molten glass at a slight upward angle; substantially as described.

10. In glass-severing apparatus, a nozzle or surrounding rin havin a slot arranged to direct a current of uid um er pressure a ainst the molten lass at a slight upward ang e and in anon-radial direction to cause a swirl; substantially as described. l

11. A receptacle for molten glass having an outlet-hole with a nozzle arran ed to direct a thin sheet of fluid against t e stream of molten glass, and an outlet for the air under pressure; substantially as described.

12. A receptacle for glass having an outlethole with a nozzle arranged to direct a cutting blast. of fluid into the glass at ajslight upward angle, and relief-ports for the excess fluid substantiall as described.

13. A receptac e for molten lass having an outlet-hole with a nozzle, saiif nozzle having ports on opposite sides connected to a source of fluid under pressure and arranged to deliver a series of thin currents of the fluid against the stream of glass; substantially as described.

14. A rece tacle for molten glass having a nozzle, said nozzle having two series of ports connected to a source of gaseous fluid under pressure, said ports being arranged to cause opposite swirls in the stream of molten glass; substantially as described.

15. A receptacle for molten glass having a refractory nozzle and a blow-ring below the nozzle arran ed to surround the glass and direct a thin s eet of fluid against it; substantially as described.

16. A receptacle for molten glass having an outlet-nozzle and a blow-ring of slightly larger internal diameter below the nozzle and having slots arran ed to direct a blast of aseous fluid against t e stream of glass inclbsed by the rin substantially as described.

17. A g ass-receptacle having aremovable blowing device sup orted beneath a hole th'erein and arran ed to direct a cuttin -0fl jet against the mo ten glass substantial described.

18.. A receptacle for molten lass having a hole in its bottom with a blowing device for cutting OH, and an internal stopper arranged to cut off the lass from the bottom hole; substantially as described.

19. A receptacle for molten glass having a yas blow-plate removably secured to its bottom,

and connected to a source of fluid under pres sure; substantiall as described.

20. A receptac e formolten glass having a refractory nozzle in its bottom, a blow-ring below the nozzle, and air-escape ports between the ring and the nozzle; substantially as described.

21. A receptacle for molten glass having a bottom refractory nozzle and a blow-plate below the nozzle having a fluid-chamber with a central ring having non-radial slots; substantially as described.

In testimony whereof we have hereunto set our hands.

H. L. DIXON. GEO. A. MARSH. Witnesses:

H. M. CORWIN, (J. D. BYRNES. 

